Kannan Ramamoorthy created VFS-833:
--------------------------------------
Summary: org.apache.commons.vfs2.FileSystemOptions#options is not
synchronized
Key: VFS-833
URL: https://issues.apache.org/jira/browse/VFS-833
Project: Commons VFS
Issue Type: Bug
Affects Versions: 2.9.0
Reporter: Kannan Ramamoorthy
*Problem:*
The map `org.apache.commons.vfs2.FileSystemOptions#options` is TreeMap. The
datastructure is not thread-safe and resulting in situations like
[this|https://ivoanjo.me/blog/2018/07/21/writing-to-a-java-treemap-concurrently-can-lead-to-an-infinite-loop-during-reads/]
when used in multithreaded environments.
*Workaround:*
As a workaround, we have to synchronize the `FileSystemOptions` in all the
places of the code.
*Solution:*
* If there is no issue, the constructor `
protected FileSystemOptions(Map<FileSystemOptionKey, Object> options)` can be
made public, so that users will have an option to pass a synchronized map when
they have to. * Or, wrap the `TreeMap` instance with
`java.util.Collections#synchronizedMap`, ensuring thread safety at the core.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
